var _a;
function greet(person) {
    return 'hello, ' + person;
}
console.log('1.', greet('TypeScript'));
var sym = Symbol(); // Symbol 类型
var obj = (_a = {},
    _a[sym] = 'semlinker',
    _a);
console.log('2.', obj);
var Direction;
(function (Direction) {
    Direction[Direction["NORTH"] = 4] = "NORTH";
    Direction[Direction["SOUTH"] = 5] = "SOUTH";
    Direction[Direction["EAST"] = 6] = "EAST";
    Direction[Direction["WEST"] = 7] = "WEST";
})(Direction || (Direction = {}));
var dir = Direction.NORTH;
var dirname = Direction[4]; // NORTH
var dirVal = Direction["NORTH"];
console.log('3.', dir, dirname, dirVal);
var value;
var value1 = value;
console.log('4.', value1);
